Max Life Refill Mats and Cartridges keep your Patio Shields, Lanterns, and Torches fueled for the long haul. No batteries or cords needed. Max Life Mats last 3X longer than original Thermacell mats, so you replace mats less frequently and run it overnight. Always be prepared by keeping an extra cartridge and mat in your tent, backpack, garage, or tackle box, ready when you need it.